When featherweight Rene Alvarado knocked out Robinson Castellanos on Feb. 15 in Puerto Vallarta, Mexico, he caught the attention of Golden Boy Promotions, which had put on the fight.

Castellanos had the been the favorite and on a good roll but Alvarado ended his 11-fight winning streak since 2010.

On Wednesday, Golden Boy signed Alvarado (20-2, 14 KOs), 25, of Nicaragua, to a promotional contract.

"This is the most exciting moment of my career, and as a member of the Golden Boy Promotions team I know I'll get every opportunity to achieve my dreams in this sport," Alvarado said in a statement. "My win against Castellanos was just the beginning, and I hope to get a world title fight soon."

Alvarado's next fight is not yet scheduled but Golden Boy chief executive Richard Schaefer said he was happy to add him to the company's deep roster.

"Rene Alvarado flew onto our radar with his win over Castellanos last month, and with his skill, determination and warrior spirit, we believe he has all the tools to become a world champion," Schaefer said. "He is a great addition to our team and we're pleased to be working with him."

Alvarado, whose two losses are by decision, turned pro in 2008 as a junior bantamweight. He has been fighting at featherweight since 2013.